1. One who doubts, or is unsettled in opinion.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• dauater,
• dubte,
• doubek,
• debter,
• dauwter,
• doughter,
• doghter,
• docter,
• daugter,
• dauhter,
• douter,
• dugter,
• doubte,
• dobber,
• doute,
• doubr,
• doubet,
• doecter,
• doube,
• doubtt

• debater,
• doubts,
• doubted,
• doubt.

The adjective form of the word "doubter" is "doubtful".

The plural of the "doubter" can be the "doubters".

The singular of the "doubter" can be the "doubter".